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BUILDING.md

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Build wasm2mpy

Warning

This is a Proof-of-Concept, not optimized or ready for actual use.

You'll need:

  • Python 3
    • pip install --upgrade pyelftools ar
  • wasm2c from WABT
  • Latest MicroPython source code
  • Target architecture toolchain

Set up the environment and build the .mpy module from .wasm:

export MPY_DIR=/path/to/micropython
export PATH=/opt/wabt/bin:$PATH
export PATH=/opt/xtensa-lx106-elf/bin:$PATH
export PATH=/opt/xtensa-esp32-elf/bin:$PATH
pip install -U pyelftools
make ARCH=xtensawin APP=zig   # x86, x64, armv6m, armv7m, armv7emsp, armv7emdp, xtensa, xtensawin

Output:

W2C test/zig.wasm
GEN build/zig.config.h
CC runtime/runtime.c
CC runtime/wasm-rt-mem-impl.c
CC runtime/wasm-rt-impl.c
CC .wasm/wasm.c
LINK build/runtime/runtime.o
arch:         EM_XTENSA
text size:    3524
rodata size:  850
bss size:     144
GOT entries:  57
GEN zig.mpy